In West Kun Lun (昆仑西 kūn lún xī) there lives a beast which looks like a dog with long fur, has four bear-like legs but no claws, has eyes but cannot see, has a nose but cannot smell, and has a stomach and intestines but no other internal organs. It's intestines are straight, food goes straight through. It cannot move. This beast is called a Hun Dun, and is one of the Four Evils (四凶 sì xiōng).
A person of high moral standing would contest the creature; a wicked person would comply with the creatures instructions.
Hun Dun is this way because the Heavens made it so.